Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	-456000000
1981-01-01	-465000000
1982-01-01	-851000000
1983-01-01	564000000
1984-01-01	515000000
1985-01-01	-399000000
1986-01-01	-994000000
1987-01-01	-650000000
1988-01-01	1172000000
1989-01-01	-1403000000
1990-01-01	-511000000
1991-01-01	173000000
1992-01-01	1444000000
1993-01-01	-1533000000
1994-01-01	-125000000
1995-01-01	-1256000000
1996-01-01	-3525000000
1997-01-01	-9232000000
1998-01-01	-1736000000
1999-01-01	-1008000000
2000-01-01	-872000000
2001-01-01	31000000
2002-01-01	570000000
2003-01-01	-1349000000
2004-01-01	-386000000
2005-01-01	-1574000000
2006-01-01	-353000000
2007-01-01	1678000000
2008-01-01	-14171000000
2009-01-01	-16642000000
2010-01-01	-11912000000
2011-01-01	-4534000000
2012-01-01	179000000
2013-01-01	-4357000000
2014-01-01	-7395000000